datagridview in vb.net

Question

Hi, 

i am new to VB.NET

 i need to know how to insert  datagridview value  (for example  3 records)  into database with separating comma..

 

diagram (assume that datagridview with one column)

 example

 example1

 example2

  

i want to insert in database like ( example, example1, example2)

 

if i retrieve value from database to datagridview means i need to display like above diagram